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Date: Mon, 20 Feb 2012 15:01:51 +0800
From: Tao Ma <tm@....ma>
To: linux-ext4@...r.kernel.org
Cc: linux-fsdevel@...r.kernel.org
Subject: [PATCH V4 17/22] ext4: let empty_dir handle inline dir.
From: Tao Ma <boyu.mt@...bao.com>
empty_dir is used when deleting a dir. So it should handle
inline dir properly.
Signed-off-by: Tao Ma <boyu.mt@...bao.com>
---
fs/ext4/inline.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
fs/ext4/namei.c | 8 ++++++
fs/ext4/xattr.h | 6 ++++
3 files changed, 83 insertions(+), 0 deletions(-)
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 3126ac3..6612ce1 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1436,6 +1436,75 @@ out:
return err;
}
+int empty_inline_dir(struct inode *dir, int *has_inline_data)
+{
+ int err, inline_size;
+ struct ext4_iloc iloc;
+ void *inline_pos;
+ unsigned int offset;
+ struct ext4_dir_entry_2 *de, *de1;
+ int ret = 1;
+
+ err = ext4_get_inode_loc(dir, &iloc);
+ if (err) {
+ EXT4_ERROR_INODE(dir, "error %d getting inode %lu block",
+ err, dir->i_ino);
+ return 1;
+ }
+
+ down_read(&EXT4_I(dir)->xattr_sem);
+ if (!ext4_has_inline_data(dir)) {
+ *has_inline_data = 0;
+ goto out;
+ }
+
+ de = ext4_get_inline_entry(dir, &iloc, 0,
+ &inline_pos, &inline_size);
+ de1 = ext4_get_inline_entry(dir, &iloc,
+ ext4_rec_len_from_disk(de->rec_len, inline_size),
+ &inline_pos, &inline_size);
+ if (le32_to_cpu(de->inode) != dir->i_ino ||
+ !le32_to_cpu(de1->inode) ||
+ strcmp(".", de->name) ||
+ strcmp("..", de1->name)) {
+ ext4_warning(dir->i_sb,
+ "bad directory (dir #%lu) - no `.' or `..'",
+ dir->i_ino);
+ ret = 1;
+ goto out;
+ }
+
+ offset = ext4_rec_len_from_disk(de->rec_len, inline_size) +
+ ext4_rec_len_from_disk(de1->rec_len, inline_size);
+ while (offset < dir->i_size) {
+ de = ext4_get_inline_entry(dir, &iloc, offset,
+ &inline_pos, &inline_size);
+ if (ext4_check_dir_entry(dir, NULL, de,
+ iloc.bh, inline_pos,
+ inline_size, offset)) {
+ ext4_warning(dir->i_sb,
+ "bad inline directory (dir #%lu) - "
+ "inode %u, rec_len %u, name_len %d"
+ "inline size %d\n",
+ dir->i_ino, le32_to_cpu(de->inode),
+ le16_to_cpu(de->rec_len), de->name_len,
+ inline_size);
+ ret = 1;
+ goto out;
+ }
+ if (le32_to_cpu(de->inode)) {
+ ret = 0;
+ goto out;
+ }
+ offset += ext4_rec_len_from_disk(de->rec_len, inline_size);
+ }
+
+out:
+ up_read(&EXT4_I(dir)->xattr_sem);
+ brelse(iloc.bh);
+ return ret;
+}
+
int ext4_destroy_inline_data(handle_t *handle, struct inode *inode)
{
int ret;
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 9f7002c..b6b718e 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2015,6 +2015,14 @@ static int empty_dir(struct inode *inode)
struct super_block *sb;
int err = 0;
+ if (ext4_has_inline_data(inode)) {
+ int has_inline_data = 1;
+
+ err = empty_inline_dir(inode, &has_inline_data);
+ if (has_inline_data)
+ return err;
+ }
+
sb = inode->i_sb;
if (inode->i_size < EXT4_DIR_REC_LEN(1) + EXT4_DIR_REC_LEN(2) ||
!(bh = ext4_bread(NULL, inode, 0, 0, &err))) {
diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 9991143..6ccfa8d 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -176,6 +176,7 @@ extern int ext4_delete_inline_entry(handle_t *handle,
struct inode *dir,
struct ext4_dir_entry_2 *de_del,
struct buffer_head *bh);
+extern int empty_inline_dir(struct inode *dir, int *has_inline_data);
# else /* CONFIG_EXT4_FS_XATTR */
static inline int
@@ -373,6 +374,11 @@ static inline int ext4_delete_inline_entry(handle_t *handle,
{
return 0;
}
+
+static inline int empty_inline_dir(struct inode *dir, int *has_inline_data)
+{
+ return 0;
+}
# endif /* CONFIG_EXT4_FS_XATTR */
#ifdef CONFIG_EXT4_FS_SECURITY
--
1.7.0.4
--
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